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In 2020, Activision branched out even further and released Call of Duty: Warzone, a free-to-play online battle royale game which pits up to 150 players against each other at one time. While the franchise was originally created exclusively for Windows, later versions were made available for numerous other platforms, including Xbox, PlayStation, Nintendo, and OS X. The most successful game in the franchise is Call of Duty: Black Ops, which has sold over 30 million units worldwide since it was first released in 2010. Published by Activision, Call of Duty (CoD) is a popular first person shooter video game series which first launched in 2003.
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